Insights into induction time and agglomeration of methane hydrate formation in diesel oil dominated dispersed systems

Induction time and agglomeration of methane hydrate formation in dispersed systems play an important role in exploitation of natural gas hydrate, prevention of gas hydrate plug, and application of hydrate based technologies. In this work, an autoclave with particle video microscope (PVM) probe was u...

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Bibliographic Details
Published in:Energy
Main Authors: Chen, Jun, Chen, Guang-Jin, Yuan, Qing, Deng, Bin, Tao, Li-Ming, Li, Chuan-Hua, Xiao, Sheng-Xiong, Jiang, Jian-Hong, Li, Xu, Li, Jia-Yuan
Format: Report
Language:English
Published: PERGAMON-ELSEVIER SCIENCE LTD 2019
Subjects:
Hydrate
Dispersed system
Induction time
Morphology
Agglomeration
Mechanism
NATURAL-GAS HYDRATE
FLOW CHARACTERISTICS
ANTI-AGGLOMERANTS
PLUS WATER
DISSOCIATION
CYCLOPENTANE
SLURRY
SURFACTANT
INHIBITORS
Thermodynamics
Energy & Fuels
Methane hydrate
Online Access:http://ir.giec.ac.cn/handle/344007/24776
http://ir.giec.ac.cn/handle/344007/24777
https://doi.org/10.1016/j.energy.2018.12.138
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Summary:Induction time and agglomeration of methane hydrate formation in dispersed systems play an important role in exploitation of natural gas hydrate, prevention of gas hydrate plug, and application of hydrate based technologies. In this work, an autoclave with particle video microscope (PVM) probe was used to detect induction time of methane hydrate formation as a function of the water cut, dosage of sorbitan monolaurate (Span 20), and subcooling. Forty-one experiments and thirty-six experiments of induction time have been conducted for methane hydrate formation at constant pressure and at nonconstant pressure, respectively. The results showed subcooling was the major factor that affects induction time during methane hydrate formation process. Subcooling of 4 K can be seen as an inflection point because the average methane hydrate formation time was less than 200 min when the subcooling was greater than 4 K, while methane hydrate formation time exhibited more stochastic when the subcooling was less than 4 K. The results also suggested that there exists a transformation range of subcooling (TRS) during methane hydrate formation process. The agglomerated mechanism of methane gas hydrate may be changed when the subcooling is greater than TRS, and subcooling of 4 K is included in the TRS. (C) 2018 Elsevier Ltd. All rights reserved.

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